refactor: 彻底删除计划模块status字段+新增蓝色tip

- 数据库: DROP plan_finances.status 列(幂等迁移)
- 后端: routes.py TABLES移除status, migrate用显式列名
- 前端: plan.js移除表单/表格/过滤/汇总所有status引用
- planFilter值从待签约改为projects
- 计划页面顶部新增蓝色tip提醒条
- 版本号 v1.0.0.22

templates/index.html

@@ -80,7 +80,7 @@
     <header class="topbar border-b border-slate-200 bg-white px-8 py-5">
       <div class="flex items-center gap-3 w-full">
         <div class="flex-1">
-          <p class="eyebrow text-xs font-semibold uppercase tracking-[0.18em] text-blue-700">OPC Manager <span class="ml-2 text-xs font-normal text-slate-400 tracking-normal">v1.0.0.21</span></p>
+          <p class="eyebrow text-xs font-semibold uppercase tracking-[0.18em] text-blue-700">OPC Manager <span class="ml-2 text-xs font-normal text-slate-400 tracking-normal">v1.0.0.22</span></p>
           <div class="flex items-center gap-4 mt-1">
             <h1 class="text-2xl font-semibold" id="workspaceTitle">科普 OPC 工作台</h1>
             <div class="hidden sm:flex items-center gap-1.5 bg-gradient-to-r from-blue-50 to-indigo-50 border border-blue-100 rounded-full px-4 py-1.5">